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In this section, you will carry out the following basic estimation and tests of differences using the provided SampleDataSet.xlsx:
Identify three continuous and three discrete variables and describe their distribution numerically (e.g., central tendency, spread) as well as graphically. Compare the results.
Using the variables selected, conduct all possible t-tests and chi-squared tests. Describe your findings.
In addition, discuss how data limitations (e.g., missing values, etc.) can affect the validity and reliability of statistical estimations and tests of differences. Be specific. Show your work using Microsoft Excel and import your work into a Microsoft Word document.
Suppose a bookie will give you $6 for every $1 you risk if you pick the winner in 3 ballgames. For every $1 bet, you either lose $1 or gain $6. What is the bookies expected earnings per dollar wagered?
If a researcher decides to use multiple comparisons in a study with three conditions, what is the probability of a Type I error across these comparisons? Use the Bonferroni adjustment to determine the suggested alpha level.
Generate a training sample of size 100 for each class, as well as a test sample of 5,000 per class. (Best to generate the centroids matrices per class once and store them).
ambulance response time is measured as the time in minutes between the initial call to emergency medical services ems
in a large population 95 of the households have cable tv. a simple random sample of 64 households is to be contacted
Using the following data on 15 workers, construct an exact 95% confidence interval for µ.
What deccision should be made about the null hypothesis, and what decision should be made about the effect of the program.
The data studies the effect of dietary calcium on blood pressure. In the experiment, one group of black male adults received calcium supplements for 12 weeks.
Suppose you are traveling on business to a foreign country for the first time. You do not have a bus schedule or a watch with you. However, you have been told that buses stop in front of your hotel every 20 minutes throughout the day. If you show ..
What is meant by a probability distribution? Discuss how you could use one of the text probability distribution at your workplace to help solve a business problem.
Answer all of these questions using R Commander. Include all graphs, outputs from R Commander.
Community college spends each year. If she wishes to be 90% confident, how large a sample is necessary if the standard deviation is known to be $80?
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